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Loft Conversion Approval Rates in Brent

Loft conversions change your roofline — and that makes them one of the more closely scrutinised application types. Councils scrutinise visibility, overlooking and street character more closely than for ground-level work. Here's what the data shows in Brent.

4,278 real decisions·January 2020 to present·Updated June 2026
73.3%
Approval Rate
4,278
Decisions
3,134
Approved
1,144
Refused
73.3% approved. But 1,144 refused since 2020. Each refusal cost the homeowner time and money on drawings and application fees. Understanding your local data before you apply is the difference between confidence and a costly gamble.

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Why loft conversion approval rates matter

Loft conversions face more scrutiny than rear or side extensions because they change the property's profile from the street. Dormers, mansards and hip-to-gable alterations are particularly sensitive.

These are council averages. Your property is specific.

Two houses on the same street can get different outcomes.
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How loft conversions compare to other project types

Not all applications are treated equally. Here's how loft conversions stack up against other common projects in Brent.

TypeDecisionsRate
Basement1,503
83.6%
Garage / Parking7,272
79.2%
New Build1,938
78.8%
Extension (General)1,287
78.2%
Wraparound Extension1,399
76.9%
Conservatory636
76.4%
Dormer7,009
75.5%
Hip-to-Gable Conversion2,391
75.4%
Side Extension5,158
74.3%
Loft Conversion4,278
73.3%
Rear Extension12,232
72.6%
Flat Conversion3,743
71.9%
Change of Use (Residential)2,005
67.9%
Outbuilding2,380
66.6%
Front Extension760
64.3%
Annex37
48.6%
HMO742
44.5%
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What the data tells us

1
73.3% of loft conversion applications in Brent get approved. That means 1,144 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
3
Council averages are starting points, not guarantees. The decisions that matter most are the comparable ones near your specific property — because planning officers look at precedent, character and the immediate context of your street.

Before you spend £5,000+ on architects and drawings

1,144 loft conversion applications in Brent have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A free, property-specific report shows you what gets approved — and what gets refused — near your property.

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More Brent planning data

Nearby councils loft conversion data

Methodology: Based on 4,278 planning decisions classified as loft conversions in Brent, January 2020 to present. Classification uses keyword matching against proposal descriptions (matching generate_site_data.py rules). A single application may appear in multiple categories. Approval rate = approved / (approved + refused). Pending, withdrawn and invalid applications excluded. Data from Brent Council's public planning portal. Full methodology →
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